Machinery for manufacturing curved printing-plates.



. A. BGL* l lllwinmix-Y,ramal MLNUPAGTUmzG @URVBD PRINTING PLATES..

Patented July 18, 19111.

A. EGLI. MACHINERY FOR MANUFACTURING CURVBD PRINTING '.PLATES.

APPLICATION IILED JULY 28,1908.

Patent-,ea July 18,1911'.

JA. EGLI. MACHINERY FOB. MANUIAOIUBING GURVED PRINTING PLATES.

a anims- WEET 4.`

Patented Ju1yf18, `1911.Y

APPLICATION FILED JULY 28, 1908.

@finan-esa A. EGLI." MACHINERY Non MANUFACTURING cum/ED PRINTING PLATES,

Patented July 18, 191:1.

AP1LIOATION FILED JULY 28,1908.

A. EGLI.

MACHINERYTOR MANUFAGTURNJ GURVED PRINTING PLATES.

APPLICATION YILED JULY 28.1908.

Patented July 18,1911.

8 SHEETS-SHEET 6.

v A. EGLI. MACHINERY FOR MANUFACTURING CURVED PRINTING PLATS.

APPLIGATIN IILED JULY 28.1908.

Patented July 18` 1911.

A. EGLI. MACHINERY FOR MANUFAGTRING GURVBD PRINTING PLATES.

` APfLIoATIYoN FILED JULY 28,'1908..

998,081. v Patented'Ju1y18,1911.-,

8 SHEETSHSH-EET 8.

UNITED stings rainnir 4Annota) EGLI.` or PLAUEN, GERMANY, assienois To-VoGTLND-Iscnn Masointimi;4

FABRIK (voRMAkLs J. c. e H. DIETRICH) .sxfr.-ons...or rLAUEN.. GERMANY.

MACHINRY FOR MNUFACTUBNG CURVED .PRINTING-PLATES.

Specification of Letters Patent.

Application filed July 28.

To all iiliom 'it may concern.'

Be itI known that l. ARNOLD lhiLi, a subject of the King ot Prussia.'residing at lllaueii i. V., in the Kingdom of Saxony and German Empire,have invented new and useful lyinproven'ients `in hlaehinery forManufaeturinlgr Curved Printing-Plates, of whieh the followingl is aspecification.

`The object of my invention is to produce a iiiaohine for-casting andinisliiiig-print- .ing-plates (stereotype-plates) for rotary printingpresses.

According to my invention. l provide a plurality ot cylinders,alternately employed as core and milling o vlini'lers and so airanged asto be brought into their alternati. ing working positions in apredetermined order, by'means ot' suitable mechanism to be. hereinafterdescribed.

My machine is fitted with two or more cylinders, of which, alternately,the one temporarily serves as a mold tor casting a printing plate andtheother` temporarily acts as milling Cylinder for the plate which hasjustbeen east.'4 The molten metal is conveyed to the mold (whiehduringthe casting operation is suitably closed) hy a mixing apparatus in theshape ot a. screw conveyer. For holding the matrix lightly up to thecore during the casting and 'for releasing it again after the v.stingij. eoi1 trivanees are employed consisting ot' segments andlstops.On eoiu--lusion ot the casting operation, the printing plate. isseparated from the matrix and. Core and. after tliedead head has beenremoved the yplate vis conveyed to a` boring. device which removes theuneven places from the plate. The said boring device, hke the devieestor holding the plate up to the Core and for l releasing it. actuatedindependently of the mold ol the foundry furnace and ot the milling`cylinder in a predetermined order.

'.llie operations of the machine are' controllidby a common actuatingdevice and y by the aid of el utehes and intermediate gearing and are sotimed with relation to each other, that every single .operation takesplace atl'the proper time, so that a finished nrinting'iilate, thoughobtained from sta.T tionary matrices, isL manufactured much morerapidly, than on other machines of the lsame class, and the operations`asr a Whole,

are materially simplified.

Patented Jiily 18, im 1908. serial No. 445,840.

My invention is illustrated in the :iet-oni panying drawings, in which:

`Figure 1 is a. side elevation, partlyY in seot-ion, of the machine, thecylinders in the milling position being shown partly rotateiil, themechanism illustrated in Figs. 9 and l() not beingr visible in Fig. 1.Fig. l'is a plan of the machine. Fig. 3 isa cross-section of the mold,while on the core; Fig. 3 is an elevation of the matrix supporting meehamsm; Fig. 3* 1s a sectional view on line (1e-a.

of Fig. 3L; Fig. t is on a large scale a cross .section of the moldremoved from the core; Fig. `5 is,4 on the samescale as Fig. 4, :iside-eleif'ation ofthe mold; IFig. 6 is a seetional elevation of thedevice for actuating the brushes, the section being on line A--A of Fig.'i'. Fig. 7 a front elevation and seetion. on line lik-B of Fig. 6, ofthe milling cylinder with the device for actuating the brushes. Fig. 8isa sectional plan of the matrix and printing-plate, on leaving themold. with the sliding brushes acting on the matrix. Fig. 9 is a sideelevation, partly in section, of a portieri of the boring device, thesection being on line D-D of Fig. l7 on a larger seale. Fig. 10 is aside elevation of the gear for throwing the cuttersnindle in and out.the position of the milling cylinder being tbesarne as in Fig. l, but ona larger scale. Fig. 11 is a. horizontal section on line. EWE-ot Fig.l0; Figs.`12,'

giiining ot the tlirmving ont. Fig. 13 at the lend of the throwing ont,and Fig; 14 at the'v time when it enters theboring bed. Fig. 15 isa.side elevation on an enlarged scale, of

the gear for reversing the slide with the casting and millingeylindersand oraais'- ing and sinking the boring bed. Fig. '16

Fig. 17 shows, on an enlarged scale. a portion of the'clutch for' is aplan of Fig.` 15.

intermittently raising and lowering'l the'boring bed.

in section.

Fig. 18 'is an elevation 'ofy-the printing plate with the locking railsshown The casting apparatus consists `of the i foundry tank l, removablyarrangedin the 'miifurnaee 2. Above thetank 1 'ismouiitd agitatingdevice, whiehgita't the Sim line] conveys theinolten metjlifrom themold. It consists of a screw conveyer 3, mounted within a casing 12provided with inlet and outlet openings. The conveyer isf driven bybevel gears 4, 5 and a belt-pulley f By this means the molten metal inthe tank is maintained in constant circulation and a uniform temperatureof the metal is maintained. It further serves to convey the metal to themold 14. The feeding is controlled by a valve 6, located above theconveyer 3.

The valve is normally kept open, so that the molten mass raised by theconveyer, instead of being conveyed to the mold, is' discharged throughthe open valve 6 into the upperchamber 121 partitioned oif from thecasing 12, from which chamber it is permitted to fiow back to the tank1, the upper chamber l 121i' being provided with a disci'largev outletnot shown in the drawings. When, however,

the valve 6 is closed, themetal is lifted into the passage 7 by thescrew 3 and is thus fed in-to the mold 14, situated in front of themouth of the passage 7.- The valve 46 is' closed by means of ane1ectro-magnet 9,- to which the energizing current is supplied throughwires, as shown, from any sourceof electricity. The core 10 of themagnet 9 is secured to one arm 0f a wei hted lever 11, pivoted to astandard moun ed on the furnace. weighted arm of the lever is limited bya suitable stop. The circuit incosing the electro-magnet 9 isautomatically closed by means of contacts not shown in the drawings. Thesaid contacts close automatically at the moment when the cylinder 24,serv-v ing as a core, arrives in the casting position in front of themouth .of the passage' 7. The magnet. 9, when energized, pulls the armof the lever 11 to which it is fastened down and thereby closes thevalve 6 at .the lower end vof a rod lpivotally connected to the y leverarm near the magnet. The valve 6 is movement is assisted the weight onthe other lever arm. This occurs. as stat-cd',

yevery time, when thc mold is filled. and the valve 6 remains openduringv the period, u'bilc tiro cylinder 24 with the printingplatc casi'arm-ind it, is boing removed from its position :-io\\'n in Fig. l andbrought into the milling position. To koop ibo valve open duringr saidperiod. the magno? Sl must be dcenergized :lttho 'nicht moment, z'. c.as soon The downward movement of thel o is no longer dischargedthroughthe pas?l as the cylinder 24l with the printing-plate `'jcast toitis removed from its casting posi- -.tion. The contacts of theeneriglzing cir-` cuit, having previously been closed by the cylinder 24onarriving in the castingposition, are separated by said cylinder onleaving the casting position, and the magnet 9 will not be energizedagain and thereby the valve 6 closed, until another cylinder arrives inthe casting position andcloses the contacts anew. l j

Immediately below the discharge end of the passage7 a heater 13 isvlocated to prevent the molten metal from congealing before it flowsinto the mold.

The concave/d fixed mold member 14 is suitably carried by or adjacent tothe front of the furnace 2,7and is provided with means forproperlyengaging a matrix, and for cooperating with said cylinder 24,which is constructed to act as the opposite or convex mold member. v

The means for supporting thev so-callcd matrix-lock a matrix carriageconsisting of two pairs of arms or guide-rails 17, having inturnedopposing` ends 171 and a matrix frame. Said l I I the matrix, or

1s carried by f arms or guide-rails 17 are slidable in dovctail groovesor .slide-ways formed in the sides..of utlinrqldmember 14, whereby theends ll'are: movable toward and away from -the concaved face of said4mold member 14 -in two superposed sets. Resiliently mounted betwen thesuperposed extremities of the ends 171.and supported thereby arethevertical matrix? `frame supporting strips 21. The resilientsupporting lmeans for said ystrips 21 is embodied in the comparativelyheavy leafrsrprings 22 which are each. secured at oii'ef'ggnd to studs22l carried in suitable posit/ion by said arms 17 on their 4ends 17 andhave their opp site ends formed to support said strips 2 whereby saidstrips arev freely and|resiliently supported between `the innerextremities of superposed arms and are spring-pressed toward one anotherfor the purpose hereinafter set forth. Directly mounted upon the innerextremities of said ends v171 and spanning the intermediate spacebetween the ends 17' of each pair of arms 17 so a's to lie in variableparallel relation to the concaved face of mold member 14, are thesemicircular elements 15 and 16 which formA` part of a separable matrixyframe. The up'- per semi-circular element l15' is 'secured to the undersides of the upper pair of arms 17 and the lower element v16 iss'ccur'ed on tbe upper'sides 'of the lowei-"pair 17,.and the elements 15and V16 are preferably provided with the opposing shoulders 151 and 161.(best. seen in Figs.' l and 3a and in dotted lines in Fig. 5) whosefunction will later appear.'

The separable matrix frame is completed.

-eylindrieal form,

`the matrix then secured to the strips 21 along @aid longitudinaledtgfes` through the intermediary of `said clamps 1S, 19. The same boltsor screws Wlneh are employed lto clamp the members 18, 1S) to the matrixmay also be used to be passed vthrough the strips 21 to support saidmatrix thereon.

`When the matrix has been mounted in the clamps '18, 1f) and upon andbetween the strlps 21, it is subjected to the inward pres-` sure of thesprings 2,2, the latter acting! to seat the upper and lower curved edgesof the matrix upon. the shoulders and 161 `above described.'

',y the devices just described, a matrixr slun'iortingg; meehaniem isprovided, by means et whirh ainatrix is securely and adtaluately held inposition to be clamped bei ween two mold nielubers, and is also.ffarriml in a manner which ei'iahles it to be operated on b rineehanism to separate the matrix from tbe (fasting as hereinafterdescribed. As will be .seen in Fig. 1; the mold member` i4 is |'irovidedwith aunular` intg-rnai seats against whieh tbe. members lf3 and lt maybe seated when their niold trienio-ersv are brougrlLt together. Thesliding guide-:trium li' .stand in the extended p tion ot hier. il.until the cylinder 2l is brought. againstr the supported matrix, whenthe-latter is earried inwardly by said e'vlinde' and seated as shown inFigs. l and when the eylinder 2l is .rithdrawn 't'rolu the mnh! member14. the matrix adheres tothe -a.-ti.f\ and thus draws the matrix trarneand the carriage. out Yfrom said mold minuta-r 'llluntil theseparatitng; inerhanif-:nl or brn-.l.iinj, lneehanism is set intooperation.

.'\n erreur-:ion eluteh or inatri loelt is in'ovidmlto loelt the tnomold members and the matrix immombly in position during the e ingroperation. Said loelt or rluleh von. ot trio rertieally disposed bladesor rods :Il nioaable, laterally iuparallel slots toi-med rertirally inopposite sides' oifthe cylinder L-l adjacent the clamping' members ofthe matrix trame. Located behind the blades iff-l and suspended from atransverse bar 25 whieh is ve 't' ally movable andproii-etsy trom thesides it' said 'eylinder24`l are the rertieally slidablt` `bars 2G. Saidbars Ballare pin and slot, connections with the bars 253 through thediagonal slots 31a, so that vertical movement of said bars 26 willseparate the blades 23 and causeV the latter to 'extend' outwardlythrough thenslots in the sides of the cylinder to bear against thematrix frame and clamp the cylinderT the matrix and mold member 14frietionaliy together. to throw the blades 23 by means of hooks or arms27, which are pivoted to the sides of the mold member 14 and havetheirupturned ends in bearing contact with the under sides of the ends ofsaid bar Connected to the arms 2T by pin and slot connections andvertically slidable through suitable bearings 281 on lthe sides of themold member 1,4 are theyertieal slide-rods 2S vwhose lower ends areprovided with cam rollers which have an operative Contact' with thecam-members 29 earried on opposite sides of the machine frame, andactuated from the drive shat't or screw-spindle 30, as hereinafterdescribedA As has been mentiom'i; before, in order to make theopeiatiouof the'lnaehine eontinuous, z'. e. cast-ing, milling and boring of aplate, two or mol'e cylinders 24 are pro- '\'ided, which sueeessivelyare tirs-,t brought,

up to the ear-'ting mold4` then to the milling cutter and fin-ily tothe, boringbed. ln the eonstruetiou shown inthe drawings. two cylindersare' employed which alternately serre as a core and as a supportfor theprinting plate in the milling position. llaeh eylinder 24- is soconstructed that one half ot'y its eireumferenee serves as a core forcasting.: the printing plate and for supportin;r the same in the millingoperation, and

the other halt carries on its lower part the brushes 3l. The saidbrushes are wedgeshaped and' secured to the outside of the cylinder 24-by the ends of resilient halfrings 32. The brushes serve to separate thematrix from the east printing plate (Fig. 8) still adheringr to thesame. To better enable the brushes 31 to enter between the matrix andthe printing plate, the front.. edges of the (damping bars 19 areslightly bent outwardly (Fig. 4'), thereby forming a wmlge-slml'iedspare between the matrix 2() and the brushfarrier 32 upon the eastprint.- ing plate-and eylinder 2l.` ,Owing to said wedge-shaped"space,the brushes are enabled to first lift the elastienlatrix` at its edgestrom the printing-plate below it and the-n to further proceed betweenthe matrix and plate by `gently spreading the resilient ma` trix,thereby gradually separating the vmatrix from -the metal of the castplate below. The half rings 32 carrying the brushes 31 are'guided incorresponding grooves otf the cylinder 24 (Figz, 1), and the said ringsare adapted to slide withinsaid grooresineitber direction. The slidingrmovement of the said rings 32 is obtained by segment-plates 3?, 34:(Figs. and 7), loosely mounted on the vertical shaft of the cylinder 24below said cylinder, the said segment plates being alternately connectedby stays 321 with alternate rings 32. Bythis means the brushes 31 areSaid transverse bar is actuated 4 i cados;

.i shifted by the rings 32, and said rings-*Zarte partially rotated bythe segment-plates n33, 34. Each segment-plate has secured to itV fourstuds 5, 36, pro'ecting from its lower side and arranged in orward andrearward pairs, said studs being. adapted to be en gaged by lugs 37, 38projecting intotheir path of movement when the carriage 48 is moving-away from the front of the furnace 2.A The said lugs 37, 38.are securedAto the furnace and so arranged, that during the movement of thecarriage 48 away from the furnace, the lu S37 are first struck by theforward air og studs 35, 36 of the segment plates, w ereby the saidsegment plates are swung into the direction of the arrows in Fig. 3. Thepartial rotation of the segment 'plates thus produced places therearward studs '35, 36 projecting from the opposite ends of said segmentplates into positlon to be struck by the lugs 38, as the carriage 48proceeds and the segment plates v33, 34, are thereby returned to theiroriginal positions. It -will be seen, that the brushes 31 are forcedtoward each other by the sliding` rings 32', from the sides of thematrix, thus llfting the matrix from the cast plate below it, afterwhich the brushes are returned to their initial position. l

When the cylinder 24 ha'sbeen brought into the milling position for thepurpose ofremoving the dead head, it nust rotate in` the directionopposite to that of the milling?, cutters. To this end, the cylinder 24and its driving gear 40 are loosely mounted pn the shaft 39 (Figs. 1, 7and 10).. The saidgear" 40 has its hub 39*1 coupled to the cylinder 24by means of a pin 401 engaging a slot 241, formed horizontally in thelower bea-ring member of the cylinder 24, as'clearly shown in Fig. 11,and the said gear 40 is driven b y a worm-gear 41 upon a shaft 42 which1s mounted transversely of the support 48 and to-wliich rotary motion isimparted by a worm wheel 43 in' mesh with a worm- 44 on one of thecutter shafts45. The said 'cuttershafts 45 are, at their lower ends,provided with suitable clutch-mechanism 46, and are supported at theirupper end sin the ends of brackets 47 and at their lower ends in thesides of the support 48 (Figs. 10, 11) said cutter shafts being twov innumber, one for cach cylinder. effi Rotary motion is imparted to thecuttershafts 45 through vertical shaft 50, carry?` ing br vel Irear 51in mesh with similar bevelf gear. 5l1 upon a driven shaft 76 havinglmounted on it a driving pulley 52 (Fig. 10). The shafts 50 and 45,4areadaptedto be4 coupled by means of a clutchemember `53 adapted to slideonjshaft 50 and to be thrown into engagement with the' correspondingclutch member 46 'on shaft 45 by means of a shifter 54 Thefsaid shifter54 is under control of a sliding -iod 55 provided withy a. raisedcam-'face 551, which, when passing below theshifter 54, lifts theclutchmember 53 into engagement with the clutch-A inember 46. When ,theclutch is to be disengaged, said Vrod moves from under the is pivoted tothe :trame of the machine. To

this lever is pivot/ed at an intermediatepoint a link 58, the other endof which is ivotcd to a lever 59 adapted to turn'loosey on a hollowshaft 60. Within the said hollow shaft 60 a stem 96 is slidinglyarranged and the end of said stem within the hub of the lever 59 isprovided with a square portion which, when projecting from the hollow`shaft (.0, enters into a. square hole of the hub of lever 59, asclearly shown in Fig. 9, Ytheieby coupling the lever 59 to saidsh'aftliO.

The other endof the hollow shaft 60 has secured toit by a slot andpin6lb (Fig. 9) a hand-lever 6l. Owing to this connect-i. 2,1, the stem 96,engaged by the pin 61 may.b' shifted in axial direction, the'said pin mofingV in the slot 60 of the hollow shaft 60.

The' square end of the shaft 96 may thereby be withdrawn from'the hub oflever 59, -which latter, together; with th above-described V lever-androd-connec'tionv 58, -57,':-5 5, `will then be independentffoff' therocking motions of the shaft 60; Such inde'fpie'ndentI movement may bedesired for permittingthefi suplport 64 of the cylinder 24 ',tof,x"`un.in cit er direction, independent'ofthe-,milling zgear, for thepurpose of cleaningthe'cylin-l der. 60 is coupled to`fthe ;link'-5 9 bythefjsquare portion 95 of ,the stem 96.- The end. of the hollow* shafty60 adjacent to the lever 61, carries another lever 613' secured to' it,and said lever 6l has p ivotally connected to it the rod 62, the otherend of which is con nccted with the eccentric29 (Fig. 1),'controllingthe locking deviceof the mold,as already described. It is clear that byshift- Normally, however, the "hollow, shaft ing` the stem 96 mountedinside the hollow shaft 60 (Fig. 9) in the direction of the arrow, thuscoupling the shaft 60 with the link 59 hy means of the square end 95,the

mold will be locked and, simultaneously, the

milling gear started into motin'l,

N hen the milling operation is completedp-L the gear shouldautomatically 'be stopped and the clutch-membersv 70, 71, thrown into'engagement for' the purpose hereinafter described. To this end fromthe'bottoxnend of the cylinder `24 projects a tiid 571 (Figs. 11, 12,13, 14), adapted to ngage alever arm 58, before the cylinder 24hasreached' its normal position. Said lever 58 is secured to-the frame oftheniachineand is.4

swunfg lout by the stud 571, whereby the lower arm'59b of lever 58 comesto engage a vertical arm 59 projecting from the sliding 39'by giving it`a 'partial turn.

ftained by making the projecting right-hand rod 55 with the result ofshifting the saine in the direction of tlie arrow `Shown in Fig'. 10.xThe rod 55,011' bei-ng thus displaced, passes with its 'cam surface'fromunder the shifter 54,/ thereby allowing said shifter and theclutch-member 53 supported by it` to automaticallydrop out of engagementwith the clutch-member 46. The cylinder 24, accordingly, isautomatically stopped before it reaches its normal position, and, bySimultaneously throwino into gear'the screw-spindle 30, the cylinder' isfed onto the boring bed. Said' screw-spindle 30 is ,threaded in themovable nut 64" carried by a bracket located and extending below saidcarriage 64, "to move the latter when said 'spindle 30 is actuated,andis supported for a' limited longitudinal resilient movement in thecollar 64, suspended below thet'rame ofthe machine, by having a spring'p30Pencircling said spindle 30 and bearing between said collar 644 and afixed shoulder 30b on the end of said spindle. l

To return the stud 571 to its normal position ready for the next action,i. e. 'behind the lever arm 58 and out of the path of said arm 58 whenthecylinder 24 returns to the mold, the cylinder 24 must be returnedfrom the milling position to the initial position This is obend of thebar 25 impinge upon a stop 80 (Figs. 2 and 14) secured to the boringbed, whereby the cylinder 24 and its stud 571 are.

turned to occupy their normal position, as

indicated by the dotted lines in' Fig. 14. i

To bring about this partial rotation of the cylinder 24, the latter iscoupled with its driving gear 40 in such a manner as to allow of apartial rotation of said cylinderindependently. of the To this end, thehub oi cylinder l has a slot fllt in its lower end to receive theaboveaiientioned pin 401, pro jectinggtrom the hub 39 of the'wheel-shaft h @n turning' the cylinder 2l: to its starting; posiion. asshown iu Fig. ll, the said pin 410! 4wiil he moved to one end' of theslot` i241. tiers V4.6, have become engaged, the wheel 1 will. tirs-t',turn idly till the stud 401 has traveled to the opposite end of slot24:1, and :trom-this time on the cylinder'24 will be carried along' tillthe stud 571 throws the milling gear out ofoperation. its it wouldappear, the throwing out of the milling gear 4would simultaneously lockthe. moid through `the medium of the hollow shaft 60, which is given a`partial turn, andby the "lever 6lal and rod 62 connected to saul shat't60. To preventsucli locking' ot the mold, the rifzhthand end ot the rod62 has a slot 62 (Fig.

l). engaging the pin ot lever 6l, Duc to- Said slot, not only theclutch-members 60, 7l may be made to engage either manually o1' bymechanical moans, independently of as shown, and when the clutch-meintherod 62, and without actuating the lock-` ing device of the mold, butalso the clutch# member 7l may bedisengaged from the clutch-'member 69by means'of the ecent-ric l65 is rigidly secured below the carrage64,

is intermittently rotated bya, mam gear 66,`

having yfour pins 67 .axially projecting from it, of which pins, one ata'time; during the i travel ot the carriage 64'and cylinders toward themold, will strike against a stop 68 (Figs. 1 and 2) resiliently securedto the `trarne of the machine. -By the engagement of said stop, thewheel 66 will be turned one quarter of a revolution. On traveling in theopposite direction, from the mold to the milling position, the sto byone of the pins 67 w lturn aside Withf out causing a lpartial revolution'of thewheel 66. The gear wheel 66, having twice as large a diameter asthe gear 65, the shaft 63 and the supportv48 with the cylinders 24willbe turned 1809 forever quarter of a revolution ofthe `gear 66, anthrough such half revolutions of the support L18,the two cylinders 24are made to exchange their positions.

The traveling mot-ionY of the'arriage 64 V68, when struck'.

in lthe longitudinal direction of the machine is produced `in awell-known .manner by means of a 'screw spindle 30 rotatably mounted inthe frame of the machine. To one end ofsaid spindlefB'O theabove-mentioned eccentric is connected, while the other end of saidspindle carries the bevel gearstlt), 70, both meshing with a third bevelgear 73. Between the two bevel-wheels 69, T0, which are loosely mountedon the spindle 30, ,the latter carries a clutch 71 fast 'on the spindle,but capable of longitudinal movement. Each of the bevel-gears 69, 70

has a clutch-member.formedon or securedY to it, and the intermediateclutch' 71 can be shifted to engage either one or the other of saidclutch-members. The shifting of the clutch T1 is caused by a fork 'T2engaging between the two sides of the clutch and secured to the hollowshaft 60. Said fork T2 depends from a tubular element which llits uponand is keyed to said hollow shaft 60, as by a set screw. The fork 72 maybe 125 actuated either manually by means of the handlever 61, or bymechanical means ac tuatcd from the lever 61a. The shifting of theclutch in one or the other direction will cach time reverse the motionof the screwspindle 30 from its` previous motion. The

' shaft 74 of-fthe bevel-gearl'carries la worm '.75, which isengaged bya worm'zwheel 751 on the driving shaft ,715(Figs. V1 and 10). The shaft74 alsohhsisecure togit a gearwheel 7 7 in mesh with asmall gear-wheel78 carried bythe drivingjshaft 83 of the b orin device and adapted torotate the befr' which operates upon the innei'icurv'f surface of theprintingjplatg'fto smooth the same afterthe dead-head has been removed".

The boring bed l is located lat theA .end of the machine frame,oppositetogthefmold, and to said bed the printing plate is deliveredfrom the milling position. the boring bed the finished printingplate isdelivered to. the delivery table 81,-from which it is finally removed.The boring bed 80 is 'adapted to be intermittently lowered.

and raised, while sliding in grooves of the machine frame. To' producethe intermittent movements a cam disk 84 is provided, keyed to thedriving'spindle 83, and having a bearing contact with a friction. roller85 carrie-:l by the arms of a lever 85, the other arm of which lever isprovided witha Segment-al rack 8G in mesh with a 'ratchetqvheel 8 8 onthe shaft 87, from'whieh motion is imparted to another ratchet wheel 89(Fig. 2), whereby a vertical rack-bar 9.0 secured to the boring-bed 80is raised or lowered, ac-A as downwardly, the two members 93, 94

of the clutch between the ratchet wheels 88 and 89 (Fig. 16),arecontrolled by a spring 93 (Fig. 17). On forward motion of the toothedsegment 86, saidspring 93a causes the spring-actuated member of theclutch to engage the other member of said clutch keyed to the shaft 87,caush ....ittorotate and thereby move the boring ed in one di-' rectionby the aid of the pinion 859andl rack'90. On the return movement' of thesegment 86 to its initial position, the clutch member rigidly secured tothe shaft 87 .will act in the manner of a ratchet device-imparting nomotion to the pinion 89 and rackl 90. The motion of the boring-bed 80 ina.

vertical direction is controlled by a shifter 91, which, in the extremelower position of the bed, is actuated by a stop 92 projecting from thebed 8O near its upper end in the path of said shifter, and in theextreme upper position of the bed. by a bent lever 92,

with the result of moving the said shifterl in a longitudinaldirection.` The bent lever From 92b is actuated by a hook-shapedprojection 110 on the carriage G4 (Fig. 16), which, when reaching theright-hand end position lof'its course, catches behind the nose on topof lever 92 after the milled printing plate has been delivered to thelboring bed. Then, when the carriage 64vbegins to return to the leftvtoward' the mold, the .projection 110 engaging'the lever 92h will throwsaid lever 'over and thus advance the shifter 91 to the right, wherebythe clutch-member J4 is thrown in.'-.Owing to the slanting slot in theshifter 91, en aged by a pin projecting from acollar on s aft 87 theshaft 87, with the clutch-members 98, 94 will be alternately coupledwith the'pinion 89, and the return motion of the carriage 64-is producedin the manner described.

Every time, the boring .bed has reached its highest position, theclutch-'member 93 will be thrown out by a stop. 111 provided at thelower,v end of the rack bar 90.- This stop 111 bears against anarm of 'abent lever 112 and, by turning it, causes the shifter 91 to move aslight distance, suliicient to throw out the clutch-member 93. Theboring bed SOcontinues lo remain in its raised position, untilanothermilled printing plate arrives at the boring bed with thc carriage 64.Coincident with the delivery of a plate to the boring bed, thcclutch-membei' 71 is disengaged from the clutch-member 70 and throwninto engagement with clutch-member 69, thereby reversing the motion ofthe screw-spindle 80 and carriage G4. The disengagement of theclutch-member 71 from the clutch 70 and its engagement with ,the clutch69'is`produced at the proper time "by a stud 113 (Figi-d6), projectingfrom the side of the carriage 64 and striking against thehand-levr .'61,aS.-indicated by the broken lines 15, when the carriage ,64 has reachedthe boring bed.

, After the printing-plate has been finished 4by the tool 79, it willremain upon the table 81, while the boringbed 80 returns to its originalposition lunder contr/ol 'of shifter 91, actuated by the lever 92h andprojecting arm110, as already describ'ed,thefstop 111 and bentlever 112servingto stop the return' motion of the boring bed '80.

l The operation of the machine is as follows: The matrix 20, having beenintroduced between its retaining bars 18. 19, and secured there byscrews, or other suitable fastening vmeans, the driving gear is startedby the belt-pulley 52. The clutch-member 71, normally occupying anintermediate position between the two clutch-members 69 and.70, listhrown into engagement with the clutch-member 69 by the hand-lever (31.The screw spindle 30 causes the carriage 64 to move in a direction toplace the two cyl# inders 24 carried by the support 48 in their workingpositions, z'. e. one of the said two `the conveyer screw 3 to feedmolten metal `clrylinders yis placed before 4and pushed into' t e mold14, while the otherA cylinder will occupy the milling position. 'Tocauseeny gageinent of the clutch-members 71, (S9, and to` simultaneouslystart the driving gear of the machine, the hand-lever 61 is moved fromits central position (Fig. l1) to the r'glit'in (Fig. 1)', therebygiving the hollow of" the two cylinders 24. up to the niold14,

is stopped vby'sad cylinder bearing against the mold. The screw,nevertheless, con-Y tinues to turn, and owing to its being `resilientlycushioned by the spring 30a (Fig. l), moves back within its nut 64a inthe direction of its length, thereby turning the eccentric 29 on. itspivot 29a. Bythrowiug the eccentric29 to the'right in Fig. 1, the rod`G2 pulls the lever 61 and thereby gives a artial turn to the'shaft 60carrying the sh1fter72, thus causing the same to disenga'ge the clutches69, 71, whereupon the screw spindle is' stopped. By the same movement,to. the right ofthe eccentric 29 its operating face is moved to theleft, and lifts the -rod 28; engaged by the locking Ahooks 27,wherebythe cross-13111225 Aof the cylinder 24 and the locking bars 26 areequally raised. Said locking bars Q6 being connected by the pins 31a(Fig. 18) with the bolts 23, the latter' will be raised to loc k themold. The cylinder 24, on being moved up to the mold, will abut againstcontacts (not shown) thereby closing the circuit of the electro-magnet9, which, by attracting the lever 11 will close the valve 6 and cause upthrough the channel 7 into the mold, till the latter is completely lled.The metal,

then, finding no further outlet into the mold, raises the valve 6ands'eparates the lever 1 1 from the magnet 9.

' Vhile the casting of onevprinting plate,l is performed, the shiftingof rod (32 to the `right has turned the hollow shaft (i0 having.

coupled to it the plink 59, and through said link and vconnecting levers57, 58, ,the clutch 53 has been thrown vinto engagement with the clutch46, thereby causing the milling cylinder to be started and the printingplate carried `thereby to turn with relation to the milling cutter 49applied to it. Said cutter, removes the dead head from the printingplate.` The milling of the dead head is performed'during one revolutionof the milling cylinder, whereupon the stud 571 projecting from theclvlin'der disengages the clutch-members 4G, through the agency of thearm 59h and rod 59a.' as clearly shown in Figs. 1,0 to 14. Thedisengagement of the clutches 46,'53 is produced in such a manner,

eration the stud 57l will strike the lever-arm 'that after thecompletion of the milling op- 58, thereby pushing it aside.I This causesthe combination of levers, `rods and links 59, 58, 5i, to be shifted inthe direction ot the arrowsl `1g. 10 andffurther, the throw` ot' lever(31 to the left of its position in Fig.

1. The clutch 53 is thus released from the cllltclielG, and the partialturngiven to the hollow shaft (30 moves the clutch member 7l from itscentral position into engagement with the clutch-member TO. The' screwspindle, accordingly, will beturned opposite' direction and theeccentric in the 29 -returned to Aits initial position. ln consequence,the bars 25 and 26 also will return to their lower positions, carryingalong with them the locking bolts 2i- 3 holding the` cylinder 2stagainst the mold.. The cylinder 24 new free to be carried away bythecarriage 64 to .the millingposition. During this time the matrix 20. ismoved to the position, shown in Fig. 4:, and the lugs 37, 38, i actuatethe brushes 3l, forcing the same,

first, belowwtfhe'bars 19 to litt the sides ot the matrix from the eastplate, and then the said brushes proceed farther toward each other tocompletely separate the matrix from the plate. The carriage Gil, whilecontinuing its course to the right of the machine, carries the milledprinting plate to theboring bed 80, having a lug 80a, whereby thecylinder is turned to its initial position. The printing plate isreleased from the cyl-- inder 24 'in any suitable mannerv` and isreceived on the boring bed and returnrai there by a'ny suitable means.The carriage (fi-l, having delivered vthe plate to the boring bed 80,pushes the lever 61 over by the stud 113 and, thereby,`causes theclutch-ioei-ober 71 to rengage the clutch-member 69. 'lhe carriage (istwill now'nnove tothe lett. placing one of the two c 1linders before themold and the other cylinc er 24 .into the milling position. lVhileretreating, the carriage 6 4-, having its arm 11() en'gagedby the noseof lever 92", pushes the said lever over, thereby shitting the rod 91 tothe right,'and causing the clutch-men'iber 9-l `to engz'ige theclutchmember of pinion 89. The boring bed, carrying the printing plate,is now intermittent-ly lowered bythe aid of the mechanism vcomprisingthe parts S4; 85, 85, 86 'and 88, till the printing plate has beennished and is delivered upon the table S1. By reasonfoi thespring-zuctuated parts ot the clutches 93, 9 4, the boring bed O will befed on, downward and upward, during the stroke in one direction only ofthe reciprocating segment 8G, and the feeding' of the boring bed,downward and upward, will be performed intermittently, 1'.. e. duringthe time, when the-cutter, after leaving the surfaceof the Work, idlypursues its path outside of the boring bed. Then the cutfitting movablemember, a- 'reciprocating support for moving saidmovable member iiitosaid'fixed member, a matrix, a 'frame resiliently carrying said matrixand movable parallel to said reciprocatingsupport, a series of brushescarried by said support .and extending around said movable member'itting movable member, a reciprocating support for moving said movablemember into lsaid fixed member; a matrix, a frame carrying said matrixand comprising arms movable arallel to said reciprocating support, andmatrix-supporting-bars springsupported on said arms, a series of brushescarried' .by said support and extending around said movable memberconcentrically thereof in position to separate said matrix from thecasting, and means for act-uating said brushes as said movable member4is retracted `:trom the fixed member.

11. In a machine for casting and finishing stereotype-plates for rotaryprinting mounted to be reciprocated' between saidy mold member and saidmilling means, and a plurality of cylinders carried by said carriage andadapted to be alternately pre# sented to said mold member and saidmilling means, and means for rotating said cylinders to presentthesamesides first to said mold member and then .to said milling y13.`In a machine for casting'and nishing stereotype plates, molding meansand milling means, a cylinder adapted to complete the formation of themold and to actl to present the same portion of the cylinder before themolding means and the milling dery into said molding and milling means.

14. In a machine, for casting and milling Stereotype plates for printingmachines, a molding means, a n'iilling means, a'reciproeating carriagemounted between said molding means and said millingmeans, a revolublesupport on said carriage, and revoluble cylinders carried by saidsupport and adapted to coperate in turn with said molding means andsaidmilling means to receive the cast-ing and to mill the same.

15. In a machine for casting and `milling `means and means forintroducing the cylinstereotype plates, a molding means, a millingmeans, a reciprocating carriage mounted between said molding means andsaid milling means., a revoluble support on said carriage, `revolublecylinders carried by said support and adapted to coperatc in turn withsaid molding means and said milling means to receive the castingand tomill the same, and,

means for intcrposing a matrix between said molding means and saidvcylinders in position to be inde )endently moved in the line of movementci said carriage.

16. In a machine for casting and milling stereotype plates, a moldingmeans, amilling means,'cylindersadapted to te'alternately presentedtomsaid molding and sia-idmilling means, a matrix supported between saidmolding means andeach of said cylinders in turn, and means forseparating said cylinder with the casting from said matrix, saidseparating means consisting of Wedgesha'ped brushes disposed on o positesides of said cylinders, .supportsY therefor, and means operatingonhsaid supports to insert said brushes between said matrix and saidcasting on opposite sides and to move said brushes over the surface ofthe cylinder.

17. In a machine for casting and milling `stereotype plates, a moldingmeans, a milling means, cylindersv adapted to-be alternately presentedto saidV molding means and said milling means, aV matrix, means forresiliently supporting said matrix between said molding means and 'eachcylinder in turn, and means for separating said cylinder and its castingfrom said matrix, said separating4 means consisting of wed eshapedbrushes disposed to be inserted ei tween said matrix andthe casting,to'spread said matrix 1n its resilient sup orting means and relieve thecasting thereofl.)

In testimony whereof I have signed` my presence of name to thisspecification in the two subscribingwitnesses.

ARNOLD EGLI. Witnesses:

ALBERT HoR'N,

CHARLES LUHTMANN.

